ISO 10656:2016

Resistance welding equipment - Transformers - Integrated transformers for welding guns

ISO 10656:2016 specifies additional requirements to those given in ISO 5826 for single-phase transformers used in AC welding. It is intended to be used in conjunction with ISO 5826, whose requirements it amends.

Matériel de soudage par résistance — Transformateurs — Transformateurs incorporés pour pinces à souder

L'ISO 10656 :2016 spécifie les exigences supplémentaires par rapport à celles données dans l'ISO 5826 pour les transformateurs monophasés utilisés pour le soudage en courant alternatif. Elle est destinée à être utilisée conjointement avec l'ISO 5826 dont elle modifie les exigences.

General Information

• Status: Published
• Publication Date: 09-May-2016
• ICS: 25.160.30 - Welding equipment
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: ISO/TC 44/SC 6 - Resistance welding and allied mechanical joining
• Drafting Committee: ISO/TC 44/SC 6 - Resistance welding and allied mechanical joining
• Current Stage: 9093 - International Standard confirmed
• Start Date: 08-Sep-2021
• Completion Date: 13-Dec-2025

Relations

• Revises: ISO 10656:1996 - Electric resistance welding - Integrated transformers for welding guns
• Effective Date: 28-Jan-2012

Overview

ISO 10656:2016 - Resistance welding equipment - Transformers - Integrated transformers for welding guns - provides additional, specific requirements for single‑phase AC transformers used inside welding guns. It is intended to be used together with ISO 5826 (general transformer requirements) and amends or supplements those requirements for integrated transformer designs used in resistance welding applications.

Keywords: ISO 10656:2016, resistance welding, integrated transformers, welding guns, single‑phase transformer, welding equipment.

Key topics and requirements

• Scope and interaction with ISO 5826: ISO 10656 supplements ISO 5826; where this standard applies, its requirements modify or add to the general rules in ISO 5826.
• Transformer types and dimensions: Defines Type H and Type J integrated transformers with referenced dimension figures and tables for 50 Hz and 60 Hz variants (no‑load voltages and approximate masses included in the tables).
• Cooling: Cooling water flow rate specified as 4 l/min.
• Duty cycle: Transformers are suitable for duty cycles up to 20% (see Annex A for current/duty relationships).
• Grounding: Centre point of the secondary coil must be connected to the transformer case by a removable link.
• Thermal protection: Primary and secondary windings require thermoswitches; wiring colours specified (primary = light blue, secondary = black).
• Output current sensing: An output current sensing coil is mandatory and must conform to ISO 5826.
• Marking and identification: Voltage and earth connections must be clearly marked (U, V and earth symbol per IEC 60417). Rating plate must follow ISO 5826 format and reference ISO 10656.
• Exterior colour coding: Colour of transformer finish is specified by no‑load voltage for both 50 Hz and 60 Hz units (enables quick identification).
• Designation format: Prescribed sequence for type, voltages, current, presence of thermoswitch (T) and measuring coil (M). Example: ISO 10656 - J – 7,1 – 5,4 – 400 – TM.
• Type tests and test conditions:
  • Mechanical strength: tensile load test (10 kN progressive load, hold).
  • Dynamic output terminal test: up to 5× secondary permanent current, duty 1%, weld time 160 ms, 2 500 cycles.
  • Thermal test: heat rise limits per ISO 5826 at 20% duty, nominal primary voltage, load time 240 ms.

Applications and who uses it

• Manufacturers of resistance welding guns and integrated welding transformers
• Welding equipment designers and system integrators specifying gun‑mounted transformers
• Quality, test and compliance engineers in automotive, appliance and metal‑fabrication industries
• Procurement and certification teams ensuring equipment meets IEC/ISO welding standards

Related standards

• ISO 5826 - General specifications for resistance welding transformers
• IEC 60417 - Graphical symbols for equipment marking (referenced for earth and connection symbols)

ISO 10656:2016 helps ensure safe, interchangeable, clearly marked and tested integrated transformers for resistance welding guns - reducing integration risk and simplifying maintenance and procurement.

Standards Content (Sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 10656
ISO/TC 44/SC 6 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-03-23 2015-06-23
Resistance welding equipment — Transformers —
Integrated transformers for welding guns
Matériel de soudage par résistance — Transformateurs — Transformateurs incorporés pour pinces à souder
ICS: 25.160.30; 29.180
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 10656:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 10656:2015(E)
© ISO 2015
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

ISO/DIS 10656:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Dimensions and characteristics of transformers . 1
4 Additional equipment . 6
4.1 Grounding provision . 6
4.2 Thermal protection . 6
4.3 Output current sensing coil . 6
5 Marking . 7
5.1 Rating plate . 7
5.2 Colour of exterior finish . 7
6 Designation . 7
7 Test conditions . 8
7.1 Type tests . 8
7.1.1 Mechanical strength . 8
7.1.2 Dynamic behaviour of the output terminals . 8
7.2 Thermal test (type test) . 9
Annex A (informative) Secondary current and duty cycle(See Figure A.1) .10
Bibliography .11
ISO/DIS 10656:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10656 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 6, Resistance welding.
This second edition cancels and replaces the first edition (ISO 10656:1996).
Draft International Standards adopted by the technical committees are circulated to the member bodies
for voting. Publication as an International Standard requires approval by at least 75 % of the member
bodies casting a vote.
iv © ISO 2015 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 10656:2015(E)
Resistance welding equipment — Transformers —
Integrated transformers for welding guns
1 Scope
This International Standard specifies additional requirements to those given in ISO 5826 for single-
phase transformers for a.c. welding.
The requirements of ISO 5826 shall be followed unless amended by this International Standard.
Annex A of this International Standard is for information only.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 5826, Resistance welding e
...

INTERNATIONAL ISO
STANDARD 10656
Second edition
2016-05-01
Corrected version
2016-08-15
Resistance welding equipment —
Transformers — Integrated
transformers for welding guns
Matériel de soudage par résistance — Transformateurs —
Transformateurs incorporés pour pinces à souder
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Dimensions and characteristics of transformers . 1
4 Additional equipment . 6
4.1 Grounding provision . 6
4.2 Thermal protection . 6
4.3 Output current sensing coil . 6
5 Marking . 7
5.1 General . 7
5.2 Rating plate . 7
5.3 Colour of exterior finish . 7
6 Designation . 8
7 Test conditions . 8
7.1 Type tests . 8
7.1.1 Mechanical strength . 8
7.1.2 Dynamic behaviour of the output terminals . 8
7.2 Thermal test (type test) . 9
Annex A (informative) Secondary current and duty cycle .10
Bibliography .11
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC ISO/TC 44, Welding and allied processes,
Subcommittee SC 6, Resistance Welding and allied mechanical joining.
This second edition cancels and replaces the first edition (ISO 10656:1996), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 10656:1996/Cor. 1:2000.
This corrected version of ISO 10656:2016 incorporates the following corrections:
— the example of a designation in Clause 6 has been dated with the year of publication;
— a key has been added to Figure A.1.
Requests for official interpretations of any aspect of this International Standard should be directed to
the Secretariat of ISO/TC 44/SC 6 via your national standards body. A complete listing of these bodies
can be found at www.iso.org.
iv © ISO 2016 – All rights reserved

INTERNATIONAL STANDARD ISO 10656:2016(E)
Resistance welding equipment — Transformers —
Integrated transformers for welding guns
1 Scope
This International Standard specifies additional requirements to those given in ISO 5826 for single-
phase transformers used in AC welding. It is intended to be used in conjunction with ISO 5826, whose
requirements it amends.
2 Normative references
The following documents, in whole or in p
...

NORME ISO
INTERNATIONALE 10656
Deuxième édition
2016-05-01
Matériel de soudage par résistance —
Transformateurs — Transformateurs
incorporés pour pinces à souder
Resistance welding equipment — Transformers — Integrated
transformers for welding guns
Numéro de référence
©
ISO 2016
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2016, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée
sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie, l’affichage sur
l’internet ou sur un Intranet, sans autorisation écrite préalable. Les demandes d’autorisation peuvent être adressées à l’ISO à
l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – Tous droits réservés

Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Dimensions et caractéristiques des transformateurs . 1
4 Equipement complémentaire . 6
4.1 Disposition pour la mise à la terre . 6
4.2 Protection thermique . 6
4.3 Tore de mesure du courant secondaire . 7
5 Marquage . 7
5.1 Généralités . 7
5.2 Plaque signalétique . 7
5.3 Couleur de l’enveloppe extérieure . 7
6 Désignation . 8
7 Conditions d’essai . 8
7.1 Essais de type . 8
7.1.1 Résistance mécanique . 8
7.1.2 Comportement dynamique des bornes de sortie . 8
7.2 Essai d’échauffement (essai de type) . 9
Annexe A (informative) Courant secondaire et facteur de marche.10
Bibliographie .11
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes
nationaux de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est
en général confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir www.
iso.org/directives).
L’attention est appelée sur le fait que certains des éléments du présent document peuvent faire l’objet de
droits de propriété intellectuelle ou de droits analogues. L’ISO ne saurait être tenue pour responsable
de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant
les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de
l’élaboration du document sont indiqués dans l’Introduction et/ou dans la liste des déclarations de
brevets reçues par l’ISO (voir www.iso.org/brevets).
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la signification des termes et expressions spécifiques de l’ISO liés à l’évaluation
de la conformité, ou pour toute information au sujet de l’adhésion de l’ISO aux principes de l’Organisation
mondiale du commerce (OMC) concernant les obstacles techniques au commerce (OTC), voir le lien
suivant: www.iso.org/iso/fr/avant-propos.html
Le comité chargé de l’élaboration du présent document est l’ISO/TC 44, Soudage et techniques connexes,
sous-comité SC 6, Soudage par résistance et assemblage mécanique allié.
Cette deuxième édition annule et remplace la première édition (ISO 10656:1996) qui a fait l’objet d’une
révision technique. Elle comprend également le Rectificatif technique ISO 10656:1996/Cor. 1:2000.
La présente version française de l’ISO 10656:1996 correspond à la version anglaise publiée le
2016‑05‑01 et corrigée le 2016‑08‑15.
Il convient que la demande d’interprétation d’aspects techniques de la présente Norme internationale
soit adressée au secrétariat de l’ISO/TC 44/SC 6 via l’organisme national de normalisation de
l’utilisateur; une liste de ces organismes peut être obtenue à l’adresse suivante: www.iso.org.
iv © ISO 2016 – Tous droits réservés

NORME INTERNATIONALE ISO 10656:2016(F)
Matériel de soudage par résistance — Transformateurs —
Transformateurs incorporés pour pinces à souder
1 Domaine d’application
La présente Norme internationale spécifie les exigences supplémentaires par rapport à celles données
dans l’ISO 5826 pour les transformateurs monophasés utilisés pour le soudage en courant alternatif.
Elle est destinée à être utilisée conjointement avec l’ISO 5826 dont elle modifie les exigences.
2 Références normatives
Les documents de référence suivants, en tout ou partie, sont référencés de manière normative dans le
présent document et sont indispensables à son application. Pour les références datées, seule l’édition
citée s’applique. Pour les références non datées, la dernière édition du document de référence s’applique
(y compris les éventuels amendements).
ISO 5826:2014, Matériel de soudage par résistance — Transformateurs — Spécifications générales
applicabl
...